PMID- 33175512 OWN - NLM STAT- MEDLINE DCOM- 20210401 LR - 20210401 IS - 1520-5118 (Electronic) IS - 0021-8561 (Linking) VI - 68 IP - 49 DP - 2020 Dec 9 TI - Purification, Characterization, and Three-Dimensional Structure Prediction of Paramyosin, a Novel Allergen of Rapana venosa. PG - 14632-14642 LID - 10.1021/acs.jafc.0c04418 [doi] AB - Paramyosin (PM) is an important structural protein in molluscan muscles. However, as an important allergen, there is a little information on PM in the molluscs. In this study, a 99 kDa molecular weight allergen protein was purified from Rapana venosa and confirmed as PM by mass spectrometry. The results of immunoglobulin E (IgE)-binding activity and physicochemical characterization showed that R. venosa PM could react with a specific IgE of the sera from sea snail-allergic patients, and the IgE-binding activity could be reduced by thermal treatment. The full-length cDNA of R. venosa PM was cloned, which encodes 859 amino acid residues, and it has a higher homology among molluscan species. According to the circular dichroism results, Fourier transform infrared, and 2D and 3D structure analysis, both PM and tropomyosin are conserved proteins, which are mainly composed of the alpha-helix structure. These results are significant for better understanding the anaphylactic reactions in sea snail-allergic patients and allergy diagnosis. FAU - Yu, Chuang AU - Yu C AD - College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, P. R. China. FAU - Gao, Xiang AU - Gao X AD - Department of Allergy, The Affiliated Hospital of Qingdao University, Qingdao, Shandong Province 266071, P. R. China. FAU - Lin, Hong AU - Lin H AD - College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, P. R. China. FAU - Xu, Lili AU - Xu L AUID- ORCID: 0000-0001-8759-1568 AD - College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, P. R. China. FAU - Ahmed, Ishfaq AU - Ahmed I AD - College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, P. R. China. FAU - Khan, Mati Ullah AU - Khan MU AD - College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, P. R. China. FAU - Xu, Mengyao AU - Xu M AD - College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, P. R. China. FAU - Chen, Yan AU - Chen Y AD - NHC Key Laboratory of Food Safety Risk Assessment, Chinese Academy of Medical Science Research Unit, China National Center for Food Safety Risk Assessment, Beijing 100021, P. R. China. FAU - Li, Zhenxing AU - Li Z AUID- ORCID: 0000-0002-7866-681X AD - College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, P. R. China. LA - eng PT - Journal Article DEP - 20201111 PL - United States TA - J Agric Food Chem JT - Journal of agricultural and food chemistry JID - 0374755 RN - 0 (Allergens) RN - 0 (Tropomyosin) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Allergens/*chemistry/genetics/*immunology/isolation & purification MH - Amino Acid Sequence MH - Animals MH - Gastropoda/chemistry/genetics/*immunology MH - Immunoglobulin E/immunology MH - Protein Conformation MH - Sequence Alignment MH - Tropomyosin/*chemistry/genetics/*immunology/isolation & purification OTO - NOTNLM OT - Rapana venosa OT - allergen OT - paramyosin OT - purification EDAT- 2020/11/12 06:00 MHDA- 2021/04/02 06:00 CRDT- 2020/11/11 17:11 PHST- 2020/11/12 06:00 [pubmed] PHST- 2021/04/02 06:00 [medline] PHST- 2020/11/11 17:11 [entrez] AID - 10.1021/acs.jafc.0c04418 [doi] PST - ppublish SO - J Agric Food Chem. 2020 Dec 9;68(49):14632-14642. doi: 10.1021/acs.jafc.0c04418. Epub 2020 Nov 11.